Size if history table became bigger

When I looked on fog database size, I found it was much bigger than before (150Mo vs 2Mo usually).
In fact, history table is around 146Mo, but I don’t know why it grows so quickly…
I truncate it 10 minutes ago and there’s already 3000 lines which look like this :

I still don’t know if this should be considered a bug, or if it should be considered potentially problematic as it would be constantly updating the history table (creating a fairly large DB file relatively quickly.) People like logging for the most part. They don’t like what it may entail though.